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LM340 Datasheet(PDF) 16 Page - Texas Instruments

Part # LM340
Description  LM340, LM340A and LM7805 Family Wide VIN 1.5-A Fixed Voltage Regulators
PDF  37 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM340 Datasheet(HTML) 16 Page - Texas Instruments

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0.1 PF
OUTPUT
INPUT
GND
+ OUT
+
+
0.1 PF
OUTPUT
INPUT
GND
- OUT
+
+
LM340
LM79xx
0.1 PF
0.22 PF
OUTPUT
INPUT
GND
VO
R1
3.0:
Q1
2N6133
IO MAX
IQ1
IREG
VI
0.1 PF
0.22 PF
OUTPUT
INPUT
GND
OUT
R1
3.0:
Q1
2N6132
IN
RSC
Q2
2N6124
16
LM340, LM340A, LM7805, LM7812, LM7815
SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016
www.ti.com
Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815
Submit Documentation Feedback
Copyright © 2000–2016, Texas Instruments Incorporated
System Examples (continued)
β(Q1) ≥ IO Max / IREG Max
R1 = 0.9 / IREG = β(Q1) VBE(Q1) / IREG Max (β +1) – IO Max
RSC = 0.8 / ISC
R1 = βVBE(Q1) / IREG Max (β +1) – IO Max
Figure 24. High Current Voltage Regulator
Figure 25. High Output Current With Short-Circuit
Protection
Figure 26. LM340 Used With Negative Regulator LM79xx



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